Is Your Cadillac DTS Running Rough, Stalling, or Showing a Check Engine Light?
If you’re dealing with frustrating engine problems in your 2009, 2010, or 2011 Cadillac DTS, a failing Engine Control Module (ECM) is a very likely culprit. As a mechanic with over two decades of experience under the hood, I’ve seen firsthand how a faulty ECM can cause a cascade of issues that seem unrelated, from poor fuel economy and erratic shifting to a complete no-start condition. Don’t let a bad computer keep your luxury sedan parked. This is the direct, reliable solution you need.
This isn’t just a replacement part; it’s a complete, ready-to-install fix. We take a genuine GM ECM and professionally program it with the latest official software updates using your vehicle’s specific Vehicle Identification Number (VIN). This critical step ensures perfect communication between the module and your car’s systems, restoring the smooth performance and reliability you expect from a Cadillac.
Real-World Diagnosis: “A customer’s 2010 DTS came into my shop last month with intermittent stalling at stoplights and what he described as ‘jerky’ transmission behavior. He was convinced his transmission was failing. After scanning, I found no transmission codes, but I did find U-series communication codes pointing to the ECM. A failing module was intermittently dropping communication with the transmission controller, causing the harsh shifting. We installed a VIN-programmed ECM just like this one, and it completely solved both the stalling and the shifting issues, saving him thousands on an unnecessary transmission repair.”
Why Choose Our Pre-Programmed 2009-2011 DTS ECM?
Getting your vehicle back to factory-spec operation is our top priority. This module eliminates the guesswork and extra costs associated with engine computer replacement.
- โ VIN-Specific Programming Included: We flash the module to your exact VIN before shipping. This means it’s truly plug-and-play, with no need for an expensive trip to the dealership for programming.
- โ Latest GM Software Updates: Your ECM will be loaded with the newest software from General Motors, which often includes patches for drivability, emissions, and performance issues found after the vehicle was built.
- โ Solves Common Failure Symptoms: An essential fix for Check Engine Lights (CEL), communication error codes (U-codes), random stalling, rough idle, and incorrect sensor readings.
- โ Broad Interchangeability: This module, identified by part number 12625453, is a direct replacement for a wide range of service numbers, ensuring compatibility. See the list below.
Plug-and-Play Installation: No Dealer Visit Required
While professional installation is always an option, this is a straightforward job for a confident DIYer. The ECM on the 2009-2011 DTS is typically located on the driver’s side of the engine bay. Here is a general guide:
- Safety First: Disconnect the negative terminal from your vehicle’s battery and wait at least 15 minutes for the system capacitors to discharge.
- Locate the ECM: Find the existing Engine Control Module. It’s a metal box with large electrical connectors.
- Disconnect Connectors: Carefully unlatch and remove the wiring harness connectors from the old module. Inspect the pins and terminals for any corrosion or damage. Clean them with a dedicated electronics cleaner if necessary.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket.
- Install the New Module: Bolt your new, pre-programmed ECM into place.
- Reconnect and Secure: Firmly re-seat the wiring harness connectors until they click and lock into place. Reconnect your battery terminal.
- Final Check: Start the vehicle. It may run a bit rough for the first few seconds as it completes its internal checks. The check engine light should be off, and the car should run smoothly.
Guaranteed Fitment and Compatibility
This ECM is a direct replacement for vehicles originally equipped with any of the following service part numbers: 12636659, 12639300, 1263605, 12628993, 12628911, 12625453, 12622175, 12630464, or 12678512. It is also the correct electronic control module for a wide variety of other GM vehicles, including models of the Envoy, STS, Colorado, Trailblazer, Hummer H3, CTS, SRX, Canyon, Saab 9-7X, Corvette, and Lucerne. Please verify your part number or contact us with your VIN to confirm compatibility.